| Mont-Saint-Martin to Montemor-o-Novo | 1,020.70 mi (1,642.66 km) |
| Mont-Saint-Martin to Montemor-o-Velho | 956.83 mi (1,539.87 km) |
| Mont-Saint-Martin to Montijo | 1,041.90 mi (1,676.78 km) |
| Mont-Saint-Martin to Mortagua | 927.22 mi (1,492.22 km) |
| Mont-Saint-Martin to Moura | 1,024.49 mi (1,648.75 km) |
| Mont-Saint-Martin to Murtosa | 926.57 mi (1,491.17 km) |
| Mont-Saint-Martin to Nazare | 999.50 mi (1,608.54 km) |
| Mont-Saint-Martin to Nelas | 909.38 mi (1,463.51 km) |
| Mont-Saint-Martin to Obidos | 1,015.24 mi (1,633.87 km) |
| Mont-Saint-Martin to Odemira | 1,093.12 mi (1,759.21 km) |
| Mont-Saint-Martin to Odivelas | 1,045.80 mi (1,683.05 km) |
| Mont-Saint-Martin to Oeiras | 1,056.21 mi (1,699.80 km) |
| Mont-Saint-Martin to Olhao | 1,099.59 mi (1,769.62 km) |
| Mont-Saint-Martin to Oliveira de Azemeis | 915.51 mi (1,473.38 km) |
| Mont-Saint-Martin to Oliveira de Frades | 911.11 mi (1,466.29 km) |
